GCSE Maths (Edexcel)

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Relative Frequency from Two-Way Tables

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Probability Probability

Relative Frequency from Two-Way Tables

5:55 Two-Way Tables
Spec P1 P6
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  • Two way tables can show the frequencies from two independent probability experiments
  • Events are sets of outcomes that match certain criteria
  • Events are independent if the probability of one event is unaffected by whether or not the other event happens
  • Two way tables can be used to find the relative frequency of an event, which can be used as an estimate for the probability
  • It is important to add up all the cells for a specific event, including duplicates, to avoid common mistakes
  • The relative frequency of an event is the frequency divided by the total number of trials
  • The relative frequency can be used to estimate the probability of an event
  • The relative frequency of an event can be close to the true theoretical probability
  • Practice examples can help reinforce these techniques
  • Relative frequency can be calculated by identifying the frequency of outcomes that satisfy the event criteria, calculating the total frequency from all outcomes, and using the relative frequency formula
  • The probability of an event can be calculated by finding the relative frequency of the event and simplifying if necessary.

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